I thought maybe this was an early beta or maybe alpha version of the game. There's a number of differences, like sound effects, interface. It even has the original editor! The music is very different to anything heard in TrackMania Sunrise, so maybe this is the latest piece written by Henri-Pierre Pellegrin for the TrackMania series? I don't speak the language used in the video, so I can't translate anything that the guy says. Also, it seems to have an earlier version of the water, because at around 1:28 you can see the water's graphics glitching a bit.

If anyone has any idea about this, or wants to make any corrections, go ahead. This has sparked my curiosity and I hope it interests anyone else who hasn't seen this.